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FILED PURSUANT TO RULE 424(b)(5)
REGISTRATION NO. 333-83374

Subject to Completion
 
Preliminary Prospectus Supplement Dated August 14, 2002
 
PROSPECTUS SUPPLEMENT
(To prospectus dated April 1, 2002)
LOGO
 
1,000,000 Units
Merrill Lynch & Co., Inc.
Market Index Target-Term Securities®
Linked to the USD/EUR Exchange Rate due August     , 2005
“MITTS® Securities”
$10 principal amount per unit
 

 
The MITTS Securities:
 
•   100% principal protection at maturity.
 
•   No payments before the maturity date.
 
•   Linked to the value of the U.S. Dollar/Euro exchange rate, a rate which expresses the number of U.S. Dollars that can be exchanged for one Euro.
 
•   Senior unsecured debt securities of Merrill Lynch & Co., Inc.
 
•   We have applied to have the MITTS Securities listed on the American Stock Exchange under the trading symbol “EUF”.
 
•   Expected settlement date: August     , 2002.


 
Payment on the MITTS Securities:
 
•   On the maturity date, for each unit of the MITTS Securities that you own, we will pay you an amount equal to the sum of the principal amount of each unit and an additional amount based on the percentage increase, if any, in the value of the U.S. Dollar/Euro exchange rate, i.e. the appreciation of the Euro, multiplied by a participation rate expected to be between 190% and 210%. However, in no event will the amount payable exceed a maximum payment expected to be between $11.90 and $12.10 per MITTS Security. The actual participation rate and maximum payment will be determined on the date the MITTS Securities are priced for initial sale to the public and will appear in the final prospectus supplement.
 
•   At maturity, you will receive no less than the principal amount of your MITTS Securities.
 
 
Investing in the MITTS Securities involves risks that are described in the “Risk Factors” section beginning on page S-8 of this prospectus supplement.
 

 
Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus supplement or the accompanying prospectus is truthful or complete. Any representation to the contrary is a criminal offense.
 
    
Per Unit

    
Total

Public offering price (1)
  
$10.00
    
$10,000,000
Underwriting discount
  
$
    
$
Proceeds, before expenses, to Merrill Lynch & Co., Inc.
  
$
    
$
 
(1)
The public offering price and the underwriting discount for any single transaction to purchase 100,000 units or more will be $         per unit and $        per unit, respectively.
 

 
Merrill Lynch & Co.
 

 
The date of this prospectus supplement is August     , 2002.
 
“MITTS” and “Market Index Target-Term Securities” are registered service marks and “Protected Growth” is a service mark of  Merrill Lynch & Co., Inc.


Table of Contents
TABLE OF CONTENTS
 
Prospectus Supplement
 
    
Page

  
S-4
What are the MITTS Securities?
  
S-4
What will I receive on the stated maturity date of the MITTS Securities?
  
S-4
Will I receive interest payments on the MITTS Securities?
  
S-6
What is the Euro?
  
S-6
What does the USD/EUR Rate reflect?
  
S-6
How has the USD/EUR Rate performed historically?
  
S-6
What about taxes?
  
S-6
Will the MITTS Securities be listed on a stock exchange?
  
S-6
What is the role of MLPF&S?
  
S-7
What is ML&Co.?
  
S-7
Are there any risks associated with an investment in the MITTS Securities?
  
S-7
  
S-8
You may not earn a return on your investment
  
S-8
Your return may be limited
  
S-8
Your yield may be lower than the yield on a standard debt security of comparable maturity
  
S-8
The value of the MITTS Securities is closely related to changes in the value of the Euro relative to the U.S. Dollar
  
S-8
There may be an uncertain trading market for the MITTS Securities
  
S-9
Even though currency trades around-the-clock, your MITTS Securities will trade on the AMEX only during regular trading hours
  
S-9
Many factors affect the trading value of the MITTS Securities; these factors interrelate in complex ways and the effect of any one factor may offset or magnify the effect of another factor
  
S-9
Potential conflicts
  
S-10
Tax consequences
  
S-11
  
S-12
Payment at maturity
  
S-12
Hypothetical returns
  
S-14
Events of Default and Acceleration
  
S-14
Depositary
  
S-15
Same-Day Settlement and Payment
  
S-17
  
S-17
  
S-20
General
  
S-20
U.S. Holders
  
S-21
Non-U.S. Holders
  
S-22
Backup withholding
  
S-22
  
S-23
  
S-24
  
S-24
  
S-24
  
S-25
  
S-25
  
S-26
 

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Prospectus
 
    
Page

MERRILL LYNCH & CO., INC
  
2
USE OF PROCEEDS
  
2
RATIO OF EARNINGS TO FIXED CHARGES AND RATIOS OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS
  
3
THE SECURITIES
  
3
DESCRIPTION OF DEBT SECURITIES
  
4
DESCRIPTION OF DEBT WARRANTS
  
10
DESCRIPTION OF CURRENCY WARRANTS
  
12
DESCRIPTION OF INDEX WARRANTS
  
14
DESCRIPTION OF PREFERRED STOCK
  
19
DESCRIPTION OF DEPOSITARY SHARES
  
24
DESCRIPTION OF PREFERRED STOCK WARRANTS
  
28
DESCRIPTION OF COMMON STOCK
  
30
DESCRIPTION OF COMMON STOCK WARRANTS
  
34
PLAN OF DISTRIBUTION
  
36
WHERE YOU CAN FIND MORE INFORMATION
  
37
INCORPORATION OF INFORMATION WE FILE WITH THE SEC
  
37
EXPERTS
  
38

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SUMMARY INFORMATION—Q&A

This summary includes questions and answers that highlight selected information from this prospectus supplement and the accompanying prospectus to help you understand the Market Index Target-Term Securities® Linked to the USD/EUR Exchange Rate due August     , 2005 (the “MITTS Securities”). You should carefully read this prospectus supplement and the accompanying prospectus to fully understand the terms of the MITTS Securities, as well as the tax and other considerations that are important to you in making a decision about whether to invest in the MITTS Securities. You should carefully review the “Risk Factors” section, which highlights certain risks, to determine whether an investment in the MITTS Securities is appropriate for you.
 
References in this prospectus supplement to “ML&Co.”, “we”, “us” and “our” are to Merrill Lynch & Co., Inc., and references to “MLPF&S” are to Merrill Lynch, Pierce, Fenner & Smith Incorporated.
 
In this prospectus supplement and the accompanying prospectus, unless otherwise specified or unless the context otherwise requires, references to “Euro” or “EUR” are to the lawful currency of the member states of the European Union that adopt the single currency in accordance with the treaty establishing the European Community (the “EC”) as amended by the Treaty on European Union, and references to “Dollars”, “$”, “U.S.$” or “USD” are to the lawful currency of the United States.
 
What are the MITTS Securities?
 
The MITTS Securities will be a series of senior debt securities issued by ML&Co. and will not be secured by collateral. The MITTS Securities will rank equally with all of our other unsecured and unsubordinated debt. The MITTS Securities will mature on August     , 2005. We cannot redeem the MITTS Securities at an earlier date. We will not make any payments on the MITTS Securities until maturity. We have designed the MITTS Securities for investors who want to protect their investment by receiving at least the principal amount of their investment at maturity and who also want to participate in the possible appreciation of the Euro relative to the U.S. Dollar.
 
Each unit of MITTS Securities represents $10 principal amount of MITTS Securities. You may transfer the MITTS Securities only in whole units. You will not have the right to receive physical certificates evidencing your ownership except under limited circumstances. Instead, we will issue the MITTS Securities in the form of a global certificate, which will be held by The Depository Trust Company, also known as DTC, or its nominee. Direct and indirect participants in DTC will record your ownership of the MITTS Securities. You should refer to the section “Description of the MITTS Securities—Depositary” in this prospectus supplement.
 
What will I receive on the stated maturity date of the MITTS Securities?
 
On the stated maturity date, you will receive a cash payment on the MITTS Securities equal to the sum of two amounts: the “principal amount” and the “Supplemental Redemption Amount”, if any.
 
Principal Amount
 
The “principal amount” per unit is $10.
 
Supplemental Redemption Amount
 
The “Supplemental Redemption Amount” per unit will equal:
 
$10 x
 
(
 
Ending Value – Starting Value

Starting Value
 
)
 
x
 
Participation
Rate
 
but will not be less than zero nor greater than an amount expected to be between $1.90 and $2.10 per MITTS Security (the “Capped Value”). We will determine the Capped Value on the date the MITTS Securities are priced for initial sale to the public (the “Pricing Date”) and it will be disclosed in the final prospectus supplement delivered in connection with sales of the MITTS Securities.

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The “Starting Value” will be equal to the U.S. Dollar/Euro exchange rate (the “USD/EUR Rate”) in the interbank market as reported by Reuters Group PLC (“Reuters”) on page 1FED at approximately 10:00 a.m. New York City time on the Pricing Date. We will disclose the Starting Value to you in the final prospectus supplement delivered in connection with sales of the MITTS Securities.
 
The “Ending Value” will be equal to the USD/EUR Rate in the interbank market as reported by Reuters on page 1FED, or any substitute page thereto, at approximately 10:00 a.m. New York City time, on the fifth scheduled Business Day prior to the stated maturity date of the MITTS Securities. If the USD/EUR Rate is not so quoted by Reuters on page 1FED, or any substitute page thereto, then the USD/EUR Rate will be determined in accordance with the procedures described in this prospectus supplement. If such day is not a Business Day, then the USD/EUR Rate will be determined on the immediately succeeding Business Day.
 
The “Participation Rate” means a factor expected to be between 190% and 210%. We will determine the Participation Rate on the Pricing Date and it will be disclosed in the final prospectus supplement delivered in connection with sales of the MITTS Securities.
 
For more specific information about the Supplemental Redemption Amount, please see the section “Description of the MITTS Securities” in this prospectus supplement.
 
We will pay you a Supplemental Redemption Amount only if the Ending Value is

Examples
 
Set forth below are three examples of Supplemental Redemption Amount calculations assuming a Participation Rate of 200% and a Capped Value of $2.00:
 
Example 1—The Euro has depreciated versus the U.S. Dollar (i.e., the USD/EUR Rate has decreased):
 
Hypothetical Starting Value: 0.9864
Hypothetical Ending Value: 0.8878
Supplemental Redemption Amount (per unit) = $10 × 
(
0.8878 – 0.9864

0.9864
)
 x 200% = $0.00   (Supplemental
Redemption
Amount cannot
be less than zero)

Total payment at maturity = $10.00 + $0.00 = $10.00

Example 2—The Euro has moderately appreciated versus the U.S. Dollar (i.e., the USD/EUR Rate has  slightly increased):

Hypothetical Starting Value: 0.9864
Hypothetical Ending Value: 1.0259
Supplemental Redemption Amount (per unit) = $10 × 
(
1.0259 – 0.9864

0.9864
)
 x 200% = $0.80    

Total payment at maturity (per unit) = $10.00 + $0.80 = $10.80

Example 3—The Euro has shown strong appreciation versus the U.S. Dollar (i.e., the USD/EUR Rate has greatly increased):
 
Hypothetical Starting Value: 0.9864
Hypothetical Ending Value: 1.1245
Supplemental Redemption Amount (per unit) = $10 × 
(
1.1245 – 0.9864

0.9864
)
 x 200% = $2.00   (Supplemental
Redemption
Amount cannot
be greater than Capped Value)

Total amount payable at maturity = $10.00 + $2.00 = $12.00

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greater than the Starting Value. If the Ending Value is less than, or equal to, the Starting Value, the Supplemental Redemption Amount will be zero. We will pay you the principal amount of your MITTS Securities regardless of whether any Supplemental Redemption Amount is payable.
 
For more information about risks associated with the MITTS Securities, please see the section entitled “Risk Factors” in this prospectus supplement.
 
Will I receive interest payments on the MITTS Securities?
 
You will not receive any interest payments on the MITTS Securities, but will instead receive the principal amount plus the Supplemental Redemption Amount, if any, at maturity. We have designed the MITTS Securities for investors who are willing to forego market interest payments on the MITTS Securities, such as floating interest rates paid on standard senior non-callable debt securities, in exchange for the ability to participate in the possible appreciation of the Euro versus the U.S. Dollar.
 
What is the Euro?
 
The Euro is the official currency of the member states of the European Economic and Monetary Union.
 
It was introduced in January 1999 and replaced the national currencies of the then 11 participating countries. The Euro is the official currency of the member states of the European Economic and Monetary Union that adopted the single currency in accordance with the treaty establishing the EC, as amended by the Treaty on European Union. The following 12 countries currently use the Euro as their official currency: Germany, Belgium, Greece, Luxembourg, Spain, France, Ireland, Italy, the Netherlands, Austria, Portugal and Finland. There is a possibility that in the future other EC countries may adopt the Euro as their official currency.
 
What does the USD/EUR Rate reflect?
 
The USD/EUR Rate is a foreign exchange spot rate that measures the relative value of two currencies, the Euro and the U.S. Dollar. The rate is expressed as the number of U.S. Dollars that can be exchanged for one Euro. The USD/EUR Rate increases when the Euro appreciates relative to the U.S. Dollar and decreases when the Euro depreciates relative to the U.S. Dollar. On August 14, 2002, the USD/EUR Rate was equal to 0.9864, which was the rate in the interbank market as reported by Reuters on page 1FED at approximately 10:00 a.m. New York City time.
 
How has the USD/EUR Rate performed historically?
 
We have provided a table showing the monthly high, low and month-end levels of the USD/EUR Rate for each month from January 1999 to July 2002, as obtained from Bloomberg L.P. You can find this table in the section entitled “USD/EUR Rate” in this prospectus supplement. We have provided this historical information to help you evaluate the behavior of the USD/EUR Rate in various economic environments; however, past performance of the USD/EUR Rate is not indicative of how the  USD/EUR Rate will perform in the future.
 
What about taxes?
 
You generally should only be required to recognize income, gain, or loss on the maturity date or upon a sale or exchange of a MITTS Security prior to the maturity date. You should review the discussion under the section entitled “United States Federal Income Taxation”.
 
Will the MITTS Securities be listed on a stock exchange?
 
We have applied to have the MITTS Securities listed on the AMEX under the symbol “EUF”. You should be aware that the listing of the MITTS Securities on the AMEX will not necessarily ensure that a liquid trading market will be available for the MITTS Securities. You should review the section entitled “Risk Factors—There may be an uncertain trading market for the MITTS Securities” in this prospectus supplement.

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What is the role of MLPF&S?
 
MLPF&S, our subsidiary, is the underwriter for the offering and sale of the MITTS Securities. After the initial offering, MLPF&S intends to buy and sell MITTS Securities to create a secondary market for holders of the MITTS Securities, and may stabilize or maintain the market price of the MITTS Securities during the initial distribution. However, MLPF&S will not be obligated to engage in any of these market activities or to continue them once it has started.
 
MLPF&S also will be our agent for purposes of calculating, among other things, the USD/EUR Rate and the Supplemental Redemption Amount . Under certain circumstances, these duties could result in a conflict of interest between MLPF&S’s status as our subsidiary and its responsibilities as calculation agent.
 
What is ML&Co.?
 
Merrill Lynch & Co., Inc. is a holding company with various subsidiaries and affiliated companies that provide investment, financing, insurance and related services on a global basis. For information about ML&Co., please see the section entitled “Merrill Lynch & Co., Inc.” in the accompanying prospectus. You should also read the other documents we have filed with the SEC, which you can find by referring to the section entitled “Where You Can Find More Information” in this prospectus supplement.
 
Are there any risks associated with an investment in the MITTS Securities?
 
Yes, an investment in the MITTS Securities is subject to certain risks. Please refer to the section entitled “Risk Factors” in this prospectus supplement.

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RISK FACTORS
 
Your investment in the MITTS Securities will involve certain risks. You should consider carefully the following discussion of risks before you decide that an investment in the MITTS Securities is suitable for you.
 
You may not earn a return on your investment
 
You should be aware that if, at maturity, the Ending Value does not exceed the Starting Value, i.e. the Euro has not appreciated versus the U.S. Dollar, the Supplemental Redemption Amount will be zero. This will be true even if the USD/EUR Rate was higher than the Starting Value at some time during the life of the MITTS Securities but later falls below the Starting Value. If the Supplemental Redemption Amount is zero, we will pay you only the principal amount of your MITTS Securities.
 
Your return may be limited
 
Although you will receive the principal amount of $10.00 per unit of your MITTS Securities at maturity, in no event will the Supplemental Redemption Amount be greater than the Capped Value, an amount expected to be between $1.90 and $2.10 per unit. We will determine the Capped Value on the Pricing Date and disclose this value in the final prospectus supplement delivered in connection with sales of the MITTS Securities.
 
Your yield may be lower than the yield on a standard debt security of comparable maturity
 
The amount we pay you at maturity may be less than the return you could earn on other investments. Your yield may be less than the yield you would earn if you bought a standard senior non-callable debt security of ML&Co. with the same stated maturity date. Your investment may not reflect the full opportunity cost to you when you take into account factors that affect the time value of money.
 
The value of the MITTS Securities is closely related to changes in the value of the Euro relative to the U.S. Dollar
 
The value of any currency, including the Euro and the U.S. Dollar, may be affected by complex political and economic factors. The exchange rate of the Euro in terms of the U.S. Dollar is at any moment a result of the supply and demand for the two currencies, and changes in the exchange rate result over time from the interaction of many factors directly or indirectly affecting economic and political conditions in the European Union and the United States, including economic and political developments in other countries. Of particular importance are the relative rates of inflation, interest rate levels, the balance of payments and the extent of governmental surpluses or deficits in the European Union and in the United States, all of which are in turn sensitive to the monetary, fiscal and trade policies pursued by the European Union, the governments of the European Union, the United States and other countries important to international trade and finance.
 
Foreign exchange rates can either be fixed by sovereign governments or floating. Exchange rates of most economically developed nations, including the European Union, are permitted to fluctuate in value relative to the U.S. Dollar. However, governments sometimes do not allow their currencies to float freely in response to economic forces. Governments, including the European Union, use a variety of techniques, such as intervention by their central bank or imposition of regulatory controls or taxes, to affect the exchange rates of their respective currencies. They may also issue a new currency to replace an existing currency or alter the exchange rate or relative exchange characteristics by devaluation or revaluation of a currency. Thus, a special risk in purchasing the MITTS Securities is that their liquidity, trading value and amounts payable could be affected by the actions of sovereign governments or the European Union which could change or interfere with theretofore freely determined currency valuation, fluctuations in response to other market forces and the movement of currencies across borders. There will be no adjustment or change in the terms of the MITTS Securities in the event that exchange rates should become fixed, or in the event of any devaluation or revaluation or imposition of exchange or other regulatory controls or taxes, or in the event of the issuance of a replacement currency or in the event of other developments affecting the Euro, the U.S. Dollar or any other currency.

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There may be an uncertain trading market for the MITTS Securities
 
We have applied to have the MITTS Securities listed on the American Stock Exchange under the symbol “EUF”. While there have been a number of issuances of series of Market Index Target-Term Securities, trading volumes have varied historically from one series to another and it is therefore impossible to predict how the MITTS Securities will trade. You cannot assume that a trading market will develop for the MITTS Securities. If a trading market does develop, there can be no assurance that there will be liquidity in the trading market. The development of a trading market for the MITTS Securities will depend on our financial performance, and other factors such as the appreciation, if any, in the value of the Euro relative to the U.S. Dollar.
 
If the trading market for the MITTS Securities is limited, there may be a limited number of buyers for your MITTS Securities if you do not wish to hold your investment until maturity. This may affect the price you receive.
 
Even though currency trades around-the-clock, your MITTS Securities will trade on the AMEX only during regular trading hours
 
The interbank market in foreign currencies is a global, around-the-clock market. Therefore, the hours of trading for the MITTS Securities will not conform to the hours during which the Euro and U.S. Dollar are traded. To the extent that the AMEX is closed while the markets for the Euro remain open, significant price and rate movements may take place in the underlying foreign exchange markets that will not be reflected immediately in the price of a MITTS Security on such exchange. The possibility of these movements should be taken into account in relating closing prices on the AMEX for the MITTS Securities to those in the underlying foreign exchange markets.
 
There is no systematic reporting of last-sale information for foreign currencies. Reasonably current bid and offer information is available in certain brokers’ offices, in bank foreign currency trading offices, and to others who wish to subscribe for this information, but this information will not necessarily reflect the USD/EUR Rate used to calculate the Supplemental Redemption Amount, if any. There is no regulatory requirement that those quotations be firm or revised on a timely basis. The absence of last-sale information and the limited availability of quotations to individual investors may make it difficult for many investors to obtain timely, accurate data about the state of the underlying foreign exchange markets.
 
Many factors affect the trading value of the MITTS Securities; these factors interrelate in complex ways and the effect of any one factor may offset or magnify the effect of another factor
 
The trading value of the MITTS Securities will be affected by factors that interrelate in complex ways. It is important for you to understand that the effect of one factor may offset the increase in the trading value of the MITTS Securities caused by another factor, and that the effect of one factor may exacerbate the decrease in the trading value of the MITTS Securities caused by another factor. For example, a decrease in USD/EUR Rate volatility may offset some or all of any increase in the trading value of the MITTS Securities attributable to another factor, such as any increase in the USD/EUR Rate. The following paragraphs describe the expected impact on the trading value of the MITTS Securities given a change in a specific factor, assuming all other conditions remain constant.
 
The value of the USD/EUR Rate is expected to affect the trading value of the MITTS Securities.    We expect that the market value of the MITTS Securities will depend substantially on the amount by which the Euro appreciates versus the U.S. Dollar over the term of the MITTS Securities. If you choose to sell your MITTS Securities when the USD/EUR Rate exceeds the Starting Value, you may receive substantially less than the amount that would be payable at maturity based on that value because of the expectation that the USD/EUR Rate will continue to fluctuate until the Ending Value is determined. If you choose to sell your MITTS Securities when the USD/EUR Rate is below, or not sufficiently above, the Starting Value, you may receive less than the $10 principal amount per unit of MITTS Securities.

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Changes in the levels of interest rates are expected to affect the trading value of the MITTS Securities.    We expect that interest rates will affect the trading value of the MITTS Securities. In general, if U.S. interest rates increase, we expect that the trading value of the MITTS Securities will decrease and, conversely, if U.S. interest rates decrease, we expect that the trading value of the MITTS Securities will increase. In general, if Euro interest rates increase, we expect that the trading value of the MITTS Securities will increase and, conversely, if Euro interest rates decrease, we expect that the trading value of the MITTS Securities will decrease. Interest rates may also affect the economies of the member countries of the European Union or the United States, and, in turn, the USD/EUR Rate.
 
Changes in volatility of the USD/EUR Rate are expected to affect the trading value of the MITTS Securities.    Volatility is the term used to describe the size and frequency of price and/or market fluctuations. If the volatility of the USD/EUR Rate increases or decreases, the trading value of the MITTS Securities may be adversely effected.
 
As the time remaining to maturity of the MITTS Securities decreases, the “time premium” associated with the MITTS Securities will decrease.    We anticipate that before their maturity, the MITTS Securities may trade at a value above that which would be expected based on the level of the USD/EUR Rate. This difference will reflect a “time premium” due to expectations concerning the value of the Euro relative to the U.S. Dollar prior to the maturity of the MITTS Securities. However, as the time remaining to the maturity of the MITTS Securities decreases, we expect that this time premium will decrease, lowering the trading value of the MITTS Securities.
 
Changes in our credit ratings may affect the trading value of the MITTS Securities.    Our credit ratings are an assessment of our ability to pay our obligations. Consequently, real or anticipated changes in our credit ratings may affect the trading value of the MITTS Securities. However, because the return on your MITTS Securities is dependent upon factors in addition to our ability to pay our obligations under the MITTS Securities, such as any fluctuations in the USD/EUR Rate, an improvement in our credit ratings will not reduce other investment risks related to MITTS Securities.
 
In general, assuming all relevant factors are held constant, we expect that the effect on the trading value of the MITTS Securities of a given change in most of the factors listed above will be less if it occurs later in the term of the MITTS Securities than if it occurs earlier in the term of the MITTS Securities. However, we expect that the effect on the trading value of the MITTS Securities of a given increase in the USD/EUR Rate will be greater if it occurs later in the term of the MITTS Securities than if it occurs earlier in the term of the MITTS Securities.
 
Potential conflicts
 
The calculation agent for the MITTS Securities is MLPF&S, our subsidiary. Under certain circumstances, MLPF&S’ role as our subsidiary and its responsibilities as calculation agent for the MITTS Securities could give rise to conflicts of interests. MLPF&S is required to carry out its duties as calculation agent in good faith and using its reasonable judgment. However, you should be aware that because we control MLPF&S, potential conflicts of interest could arise.
 
At any given time, we and our affiliates may be engaging in foreign exchange or currency derivative transactions and expect to enter into such transactions in connection with hedging our obligations under the MITTS Securities. These transactions could affect the value of the USD/EUR Rate in a manner that would be adverse to your investment in the MITTS Securities.
 
We have entered into an arrangement with one of our subsidiaries to hedge the market risks associated with our obligations in connection with the MITTS Securities. This subsidiary expects to make a profit in connection with this arrangement. We did not seek competitive bids for this arrangement from unaffiliated parties.

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ML&Co. or its affiliates may from time to time publish research reports on the foreign exchange markets, exchange rates and other matters that may have an influence on the USD/EUR Rate. These reports may express opinions or provide recommendations that are inconsistent with an investment in the MITTS Securities. Any prospective purchaser of the MITTS Securities should make an independent investigation of the foreign currency markets as in their judgement is appropriate to make an informed decision regarding an investment in the MITTS Securities and its suitability for them in the light of their particular circumstances.
 
Tax consequences
 
You should consider the tax consequences of investing in the MITTS Securities. See the section entitled “United States Federal Income Taxation” in this prospectus supplement.
 

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DESCRIPTION OF THE MITTS SECURITIES
 
ML&Co. will issue the MITTS Securities as a series of senior debt securities under the 1983 Indenture, which is more fully described in the accompanying prospectus. The MITTS Securities will mature on August     , 2005.
 
While at maturity a beneficial owner of a MITTS Security will receive the sum of the principal amount of the MITTS Security plus the Supplemental Redemption Amount, if any, there will be no other payment of interest, periodic or otherwise. See “—Payment at maturity”.
 
The MITTS Securities will not be subject to redemption by ML&Co. or at the option of any beneficial owner before maturity. If an Event of Default occurs with respect to the MITTS Securities, holders of the MITTS Securities may accelerate the maturity of the MITTS Securities, as described under “—Events of Default and Acceleration” in this prospectus supplement and “Description of Debt Securities—Events of Default” in the accompanying prospectus.
 
ML&Co. will issue the MITTS Securities in denominations of whole units each with a principal amount of $10.00 per unit.
 
The MITTS Securities will not have the benefit of any sinking fund.
 
Payment at maturity
 
At maturity, a beneficial owner of a MITTS Security will be entitled to receive the principal amount of that MITTS Security plus a Supplemental Redemption Amount, if any, all as provided below. If the Ending Value does not exceed the Starting Value, a beneficial owner will be entitled to receive only the principal amount of the MITTS Security.
 
The “Supplemental Redemption Amount” for a MITTS Security will be determined by the calculation agent and will equal:
 
principal amount of each MITTS Security ($10 per unit)  x
 
(
 
Ending Value - Starting Value

Starting Value
 
)
 
 
Participation Rate
         
 
provided, however, that in no event will the Supplemental Redemption Amount be less than zero nor greater than the Capped Value, expected to be between $1.90 and $2.10 per MITTS Security.
 
The “Starting Value” will be equal to the USD/EUR Rate in the interbank market as reported by Reuters Group PLC (“Reuters”) on page 1FED at approximately 10:00 a.m. New York City time on the Pricing Date. We will disclose the Starting Value to you in the final prospectus supplement delivered in connection with sales of the MITTS Securities.
 
The “Ending Value” will be equal to the USD/EUR Rate in the interbank market as reported by Reuters on page 1FED, or any substitute page thereto, at approximately 10:00 a.m. New York City time, on the fifth scheduled Business Day prior to the stated maturity date of the MITTS Securities. However, if the USD/EUR Rate is not so quoted by Reuters on page 1FED, or any substitute page thereto, then the USD/EUR Rate will be calculated on the basis of the arithmetic mean of the applicable spot quotations received by the calculation agent at approximately 10:00 a.m. New York City time on such date for the purchase or sale by the Reference Dealers of the Reference Amount for settlement two Business Days later. If fewer than two Reference Dealers provide such spot quotations, then the USD/EUR Rate will be calculated on the basis of the arithmetic mean of the applicable spot quotations received by the calculation agent at approximately 10:00 a.m. New York

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City time on such date from three leading commercial banks in New York (selected in the sole discretion of the calculation agent), for the sale by such banks of the Reference Amount for settlement two Business Days later. If these spot quotations are available from fewer than three banks, then the calculation agent, in its sole discretion, shall determine which spot rate is available and reasonable to be used. If no such spot quotation is available, then the USD/EUR Rate will be the rate the calculation agent, in its sole discretion, determines to be fair and reasonable under the circumstances at approximately 10:00 a.m. New York City time on such date. If the fifth scheduled Business Day prior to the stated maturity date is not a Business Day, the USD/EUR Rate will be determined on the immediately succeeding Business Day.
 
The “Participation Rate” means a factor expected to be between 190% and 210%. We will determine the Participation Rate on the Pricing Date and it will be disclosed in the final prospectus supplement delivered in connection with sales of the MITTS Securities.
 
Business Day” means any day other than a Saturday or Sunday that is neither a legal holiday nor a day on which banking institutions in The City of New York or the member states of the European Union which use the Euro as their official currency are authorized or required by law, regulation or executive order to close and such banks are open for dealing in a foreign exchange and foreign currency deposits.
 
The “Reference Amount” equals 1,000,000 Euros.
 
Reference Dealers” as used herein, means Citibank, N.A., Deutsche Bank A.G. and JPMorgan Chase Bank, or their successors.

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Hypothetical returns
 
The following table illustrates, for a hypothetical Starting Value and a range of hypothetical Ending Values of the USD/EUR Rate:
 
 
the percentage change from the hypothetical Starting Value to the hypothetical Ending Value,
 
 
the total amount payable at maturity for each unit of MITTS Securities,
 
 
the total rate of return to beneficial owners of the MITTS Securities, and
 
 
the pretax annualized rate of return to beneficial owners of MITTS Securities.
 
The following table also assumes a Participation Rate of 200% and a Capped Value equal to $2.00.
 
Hypothetical
Ending Value of
USD/EUR Rate

    
Percentage
change from the
hypothetical
Starting Value to
the hypothetical
Ending Value

    
Total amount
payable at
maturity per
unit of the
MITTS
Securities

    
Total rate of
return on the
MITTS
Securities

    
Pretax annualized
rate of return on
the MITTS
Securities(1)

0.8483
    
– 14%
    
$10.00
    
  0.00%
    
0.00%
0.8680
    
– 12%
    
$10.00
    
  0.00%
    
0.00%
0.8878
    
 – 10%
    
$10.00
    
  0.00%
    
0.00%
0.9075
    
   – 8%
    
$10.00
    
  0.00%
    
0.00%
0.9272
    
  – 6%
    
$10.00
    
  0.00%
    
0.00%
0.9469
    
  – 4%
    
$10.00
    
  0.00%
    
0.00%
0.9667
    
  – 2%
    
$10.00
    
  0.00%
    
0.00%
    0.9864(2)
    
  – 0%
    
$10.00
    
  0.00%
    
0.00%
1.0061
    
     2%
    
$10.40
    
  4.00%
    
1.31%
1.0259
    
     4%
    
$10.80
    
  8.00%
    
2.58%
1.0456
    
     6%
    
$11.20
    
12.00%
    
3.81%
1.0653
    
     8%
    
$11.60
    
16.00%
    
5.00%
1.0850
    
   10%
    
$12.00
    
20.00%
    
6.16%
1.1048
    
   12%
    
$12.00
    
20.00%
    
6.16%
1.1245
    
   14%
    
$12.00
    
20.00%
    
6.16%

(1)
The annualized rates of return specified in the preceding table are calculated on a semiannual bond equivalent basis.
(2)
This is the hypothetical Starting Value for purposes of this table.
 
The above figures are for purposes of illustration only. The actual Supplemental Redemption Amount, received by you, if any, and the resulting total and pretax annualized rate of return will depend on the actual Starting Value and Ending Value determined by the calculation agent as described in this prospectus supplement.
 
Events of Default and Acceleration
 
In case an Event of Default with respect to any MITTS Securities has occurred and is continuing, the amount payable to a beneficial owner of a MITTS Security upon any acceleration permitted by the MITTS Securities, with respect to each MITTS Security, will be equal to the principal amount and the Supplemental Redemption Amount, if any, calculated as though the date of early repayment were the stated maturity date of the MITTS Securities. See “—Payment at maturity” in this prospectus supplement. If a bankruptcy proceeding is commenced in respect of ML&Co., the claim of the holder of a MITTS Security may be limited, under Section 502(b)(2) of Title 11 of the United States Code, to the principal amount of the MITTS Security plus an

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additional amount of contingent interest calculated as though the date of the commencement of the proceeding were the maturity date of the MITTS Securities.
 
In case of default in payment of the MITTS Securities, whether at the stated maturity date or upon acceleration, from and after that date the MITTS Securities will bear interest, payable upon demand of their holders, at the rate of     % per annum, to the extent that payment of any interest is legally enforceable on the unpaid amount due and payable on that date in accordance with the terms of the MITTS Securities to the date payment of that amount has been made or duly provided for.
 
Depositary
 
Description of the Global Securities
 
Upon issuance, all MITTS Securities will be represented by one or more fully registered global securities. Each global security will be deposited with, or on behalf of, DTC (DTC, together with any successor, being a “depositary“), as depositary, registered in the name of Cede & Co., DTC’s partnership nominee. Unless and until it is exchanged in whole or in part for MITTS Securities in definitive form, no global security may be transferred except as a whole by the depositary to a nominee of the depositary or by a nominee of the depositary to the depositary or another nominee of the depositary or by the depositary or any nominee to a successor of the depositary or a nominee of that successor.
 
So long as DTC, or its nominee, is a registered owner of a global security, DTC or its nominee, as the case may be, will be considered the sole owner or holder of the MITTS Securities represented by the global security for all purposes under the 1983 Indenture. Except as provided below, the beneficial owners of the MITTS Securities represented by a global security will not be entitled to have the MITTS Securities represented by a global security registered in their names, will not receive or be entitled to receive physical delivery of the MITTS Securities in definitive form and will not be considered the owners or holders of the MITTS Securities including for purposes of receiving any reports delivered by ML&Co. or the trustee under the 1983 Indenture. Accordingly, each person owning a beneficial interest in a global security must rely on the procedures of DTC and, if that person is not a participant of DTC, on the procedures of the participant through which that person owns its interest, to exercise any rights of a holder under the 1983 Indenture. ML&Co. understands that under existing industry practices, in the event that ML&Co. requests any action of holders or that an owner of a beneficial interest in a global security desires to give or take any action which a holder is entitled to give or take under the 1983 Indenture, DTC would authorize the participants holding the relevant beneficial interests to give or take that action, and those participants would authorize beneficial owners owning through those participants to give or take that action or would otherwise act upon the instructions of beneficial owners. Conveyance of notices and other communications by DTC to participants, by participants to indirect participants and by participants and indirect participants to beneficial owners will be governed by arrangements among them, subject to any statutory or regulatory requirements as may be in effect from time to time.
 
DTC Procedures
 
The following is based on information furnished by DTC:
 
DTC will act as securities depositary for the MITTS Securities. The MITTS Securities will be issued as fully registered securities registered in the name of Cede & Co., DTC’s partnership nominee. One or more fully registered global securities will be issued for the MITTS Securities in the aggregate principal amount of such issue, and will be deposited with DTC.
 
DTC is a limited-purpose trust company organized under the New York Banking Law, a “banking organization” within the meaning of the New York Banking Law, a member, of the Federal Reserve System, a “clearing corporation” within the meaning of the New York Uniform Commercial Code, and a “clearing agency”

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registered pursuant to the provisions of Section 17A of the Securities Exchange Act of 1934, as amended. DTC holds securities that its participants deposit with DTC. DTC also facilitates the settlement among participants of securities transactions, such as transfers and pledges, in deposited securities through electronic computerized book-entry changes in participants’ accounts, thereby eliminating the need for physical movement of securities certificates. Direct participants of DTC include securities brokers and dealers, banks, trust companies, clearing corporations and certain other organizations. DTC is owned by a number of its direct participants and by the NYSE, the AMEX, and the National Association of Securities Dealers, Inc. Access to DTC’s system is also available to others such as securities brokers and dealers, banks and trust companies that clear through or maintain a custodial relationship with a direct participant, either directly or indirectly. The rules applicable to DTC and its participants are on file with the SEC.
 
Purchases of the MITTS Securities under DTC’s system must be made by or through direct participants, which will receive a credit for the MITTS Securities on DTC’s records. The ownership interest of each beneficial owner is in turn to be recorded on the records of direct and indirect participants. Beneficial owners will not receive written confirmation from DTC of their purchase; but beneficial owners are expected to receive written confirmations providing details of the transaction, as well as periodic statements of their holdings, from the direct or indirect participants through which the beneficial owner entered into the transaction. Transfers of ownership interests in the MITTS Securities are to be made by entries on the books of participants acting on behalf of beneficial owners.
 
To facilitate subsequent transfers, all MITTS Securities deposited with DTC are registered in the name of DTC’s partnership nominee, Cede & Co. The deposit of MITTS Securities with DTC and their registration in the name of Cede & Co. effect no change in beneficial ownership. DTC has no knowledge of the actual beneficial owners of the MITTS Securities; DTC’s records reflect only the identity of the direct participants to whose accounts the MITTS Securities are credited, which may or may not be the beneficial owners. The participants will remain responsible for keeping account of their holdings on behalf of their customers.
 
Conveyance of notices and other communications by DTC to direct participants, by direct participants to indirect participants, and by direct participants and indirect participants to beneficial owners will be governed by arrangements among them, subject to any statutory or regulatory requirements as may be in effect from time to time.
 
Neither DTC nor Cede & Co. will consent or vote with respect to the MITTS Securities. Under its usual procedures, DTC mails an omnibus proxy to ML&Co. as soon as possible after the applicable record date. The omnibus proxy assigns Cede & Co.’s consenting or voting rights to those direct participants identified in a listing attached to the omnibus proxy to whose accounts the MITTS Securities are credited on the record date.
 
Principal, premium, if any, and/or interest, if any, payments made in cash on the MITTS Securities will be made in immediately available funds to DTC. DTC’s practice is to credit direct participants’ accounts on the applicable payment date in accordance with their respective holdings shown on the depositary’s records unless DTC has reason to believe that it will not receive payment on that date. Payments by participants to beneficial owners will be governed by standing instructions and customary practices, as is the case with securities held for the accounts of customers in bearer form or registered in “street name”, and will be the responsibility of that participant and not of DTC, the trustee or ML&Co., subject to any statutory or regulatory requirements as may be in effect from time to time. Payment of principal, premium, if any, and/or interest, if any, to DTC is the responsibility of ML&Co. or the trustee, disbursement of those payments to direct participants will be the responsibility of DTC, and disbursement of those payment will be the responsibility of direct participants and indirect participants.

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Exchange for Certificated Securities
 
If:
 
 
the depositary is at any time unwilling or unable to continue as depositary and a successor depositary is not appointed by ML&Co. within 60 days,
 
 
ML&Co. executes and delivers to the trustee a company order to the effect that the global securities shall be exchangeable, or
 
 
an Event of Default under the 1983 Indenture has occurred and is continuing with respect to the MITTS Securities,
 
the global securities will be exchangeable for MITTS Securities in definitive form of like tenor and of an equal aggregate principal amount, in denominations of $10 and integral multiples of $10. The definitive MITTS Securities will be registered in the name or names as the depositary shall instruct the trustee. It is expected that instructions may be based upon directions received by the depositary from participants with respect to ownership of beneficial interests in the global securities.
 
DTC may discontinue providing its services as securities depositary with respect to the MITTS Securities at any time by giving reasonable notice to ML&Co. or the trustee. Under these circumstances, in the event that a successor securities depositary is not obtained, MITTS Security certificates are required to be printed and delivered.
 
ML&Co. may decide to discontinue use of the system of book-entry transfers through DTC or a successor securities depositary. In that event, MITTS Security certificates will be printed and delivered.
 
The information in this section concerning DTC and DTC’s system has been obtained from sources that ML&Co. believes to be reliable, but ML&Co. takes no responsibility for its accuracy.
 
Same-Day Settlement and Payment
 
Settlement for the MITTS Securities will be made by the underwriter in immediately available funds. ML&Co. will make all payments of principal and the Supplemental Redemption Amount, if any, in immediately available funds so long as the MITTS Securities are maintained in book-entry form.
 
THE USD/EUR RATE
 
The USD/EUR Rate is a foreign exchange spot rate that measures the relative values of two currencies, the Euro and the U.S. Dollar. The USD/EUR Rate increases when the Euro appreciates relative to the U.S. Dollar and decreases when the Euro depreciates relative to the U.S. Dollar. The USD/EUR Rate is expressed as a rate that reflects the amount of U.S. Dollars that can be exchanged for one Euro. A USD/EUR Rate equal to 0.9864 thus indicates that 98.64 U.S. cents can be exchanged for 1 Euro.
 
The following table sets forth the monthly high, low and month-end levels in the interbank market of the USD/EUR Rate from the inception of the Euro in January 1999 through July 2002 as obtained from Bloomberg L.P. The historical performance of USD/EUR Rates should not be taken as an indication of future performance. Any historical upward or downward trend in the USD/EUR Rate during any period set forth below is not any indication that the USD/EUR Rate is more or less likely to increase or decrease at any time during the term of the MITTS Securities.

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Year

    
High

    
Low

    
Month End

1999:
                    
January
    
1.1899
    
1.1340
    
1.1362
February
    
1.1398
    
1.0926
    
1.1028
March
    
1.1070
    
1.0680
    
1.0762
April
    
1.0880
    
1.0530
    
1.0570
May
    
1.0841
    
1.0396
    
1.0420
June
    
1.0558
    
1.0258
    
1.0351
July
    
1.0743
    
1.0108
    
1.0711
August
    
1.0825
    
1.0393
    
1.0566
September
    
1.0728
    
1.0285
    
1.0684
October
    
1.0912
    
1.0438
    
1.0549
November
    
1.0591
    
1.0036
    
1.0093
December
    
1.0297
    
0.9990
    
1.0062
2000:
                    
January
    
1.0414
    
0.9668
    
0.9707
February
    
1.0090
    
0.9390
    
0.9642
March
    
0.9795
    
0.9483
    
0.9553
April
    
0.9750
    
0.9033
    
0.9119
May
    
0.9410
    
0.8850
    
0.9380
June
    
0.9700
    
0.9283
    
0.9525
July
    
0.9595
    
0.9194
    
0.9266
August
    
0.9286
    
0.8837
    
0.8878
September
    
0.9035
    
0.8443
    
0.8827
October
    
0.8856
    
0.8230
    
0.8489
November
    
0.8787
    
0.8371
    
0.8729
December
    
0.9431
    
0.8700
    
0.9427
2001:
                    
January
    
0.9594
    
0.9120
    
0.9366
February
    
0.9444
    
0.9017
    
0.9236
March
    
0.9380
    
0.8751
    
0.8767
April
    
0.9088
    
0.8699
    
0.8891
May
    
0.9004
    
0.8446
    
0.8453
June
    
0.8670
    
0.8413
    
0.8490
July
    
0.8823
    
0.8352
    
0.8764
August
    
0.9240
    
0.8741
    
0.9123
September
    
0.9331
    
0.8826
    
0.9114
October
    
0.9240
    
0.8870
    
0.9005
November
    
0.9118
    
0.8737
    
0.8964
December
    
0.9081
    
0.8743
    
0.8895
2002:
                    
January
    
0.9064
    
0.8574
    
0.8593
February
    
0.8799
    
0.8565
    
0.8693
March
    
0.8868
    
0.8633
    
0.8717
April
    
0.9044
    
0.8713
    
0.9005
May
    
0.9416
    
0.8989
    
0.9342
June
    
0.9988
    
0.9304
    
0.9914
July
    
1.0212
    
0.9716
    
0.9776

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The following table sets forth the intraday high and low levels in the interbank market of the USD/EUR Rate from August 1, 2002 through August 13, 2002.
 
      
High

    
Low

August 1st
    
0.9856
    
0.9728
August 2nd
    
0.9915
    
0.9835
August 5th
    
0.9873
    
0.9800
August 6th
    
0.9811
    
0.9624
August 7th
    
0.9757
    
0.9643
August 8th
    
0.9772
    
0.9642
August 9th
    
0.9740
    
0.9653
August 12th
    
0.9798
    
0.9689
August 13th
    
0.9844
    
0.9757
 
The following graph sets forth the monthly high and low levels in the interbank market of the USD/EUR Rate from January 1999 through July 2002 set forth in the table above. The historical performance of USD/EUR Rates should not be taken as an indication of future performance.
 
LOGO
 
On August 14, 2002 the USD/EUR Rate, as reported by Reuters on page 1FED at approximately 10:00 a.m. New York City time, was equal to 0.9864.
 
The information presented in this prospectus supplement relating to the exchange rates of the U.S. Dollar relative to the Euro is furnished as a matter of information only. The fluctuations in the USD/EUR Rate that have occurred in the past are not indicative of fluctuations in that rate which may occur over the term of the MITTS Securities.

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UNITED STATES FEDERAL INCOME TAXATION
 
Set forth in full below is the opinion of Sidley Austin Brown & Wood LLP, tax counsel to ML&Co., as to certain United States Federal income tax consequences of the purchase, ownership and disposition of the MITTS Securities. This opinion is based upon laws, regulations, rulings and decisions now in effect, all of which are subject to change (including retroactive changes in effective dates) or possible differing interpretations. The discussion below deals only with MITTS Securities held as capital assets and does not purport to deal with persons in special tax situations, such as financial institutions, insurance companies, regulated investment companies, dealers in securities or currencies, traders in securities that elect to mark to market, tax-exempt entities, persons holding MITTS Securities in a tax-deferred or tax-advantaged account, or persons holding MITTS Securities as a hedge against currency risks, as a position in a “straddle” or as part of a “hedging” or “conversion” transaction for tax purposes. It also does not deal with holders other than original purchasers (except where otherwise specifically noted in this prospectus supplement). The following discussion also assumes that the issue price of the MITTS Securities, as determined for United States Federal income tax purposes, equals the principal amount thereof. Persons considering the purchase of the MITTS Securities should consult their own tax advisors concerning the application of the United States Federal income tax laws to their particular situations as well as any consequences of the purchase, ownership and disposition of the MITTS Securities arising under the laws of any other taxing jurisdiction.
 
As used in this prospectus supplement, the term “U.S. Holder” means a beneficial owner of a MITTS Security that is for United States Federal income tax purposes (a) a citizen or resident of the United States, (b) a corporation, partnership or other entity treated as a corporation or a partnership created or organized in or under the laws of the United States, any state thereof or the District of Columbia (other than a partnership that is not treated as a United States person under any applicable Treasury regulations), (c) an estate the income of which is subject to United States Federal income taxation regardless of its source, (d) a trust if a court within the United States is able to exercise primary supervision over the administration of the trust and one or more United States persons have the authority to control all substantial decisions of the trust, or (e) any other person whose income or gain in respect of a MITTS Security is effectively connected with the conduct of a United States trade or business. Notwithstanding clause (d) of the preceding sentence, to the extent provided in Treasury regulations, certain trusts in existence on August 20, 1996, and treated as United States persons prior to that date that elect to continue to be treated as United States persons also will be U.S. Holders. As used herein, the term “non-U.S. Holder” means a beneficial owner of a MITTS Security that is not a U.S. Holder.
 
General
 
There are no statutory provisions, regulations, published rulings or judicial decisions addressing or involving the characterization, for United States Federal income tax purposes, of the MITTS Securities or securities with terms substantially the same as the MITTS Securities. However, although the matter is not free from doubt, under current law, each MITTS Security should be treated as a debt instrument of ML&Co. for United States Federal income tax purposes. ML&Co. currently intends to treat each MITTS Security as a debt instrument of ML&Co. for United States Federal income tax purposes and, where required, intends to file information returns with the Internal Revenue Service (the “IRS”) in accordance with this treatment, in the absence of any change or clarification in the law, by regulation or otherwise, requiring a different characterization of the MITTS Securities. Prospective investors in the MITTS Securities should be aware, however, that the IRS is not bound by ML&Co.’s characterization of the MITTS Securities as indebtedness, and the IRS could possibly take a different position as to the proper characterization of the MITTS Securities for United States Federal income tax purposes. The following discussion of the principal United States Federal income tax consequences of the purchase, ownership and disposition of the MITTS Securities is based upon the assumption that each MITTS Security will be treated as a debt instrument of ML&Co. for United States Federal income tax purposes. If the MITTS Securities are not in fact treated as debt instruments of ML&Co. for United

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States Federal income tax purposes, then the United States Federal income tax treatment of the purchase, ownership and disposition of the MITTS Securities could differ from the treatment discussed below with the result that the timing and character of income, gain or loss recognized in respect of a MITTS Security could differ from the timing and character of income, gain or loss recognized in respect of a MITTS Security had the MITTS Securities in fact been treated as debt instruments of ML&Co. for United States Federal income tax purposes.
 
U.S. Holders
 
On June 11, 1996, the Treasury Department issued final regulations (the “CPDI Regulations”) concerning the proper United States Federal income tax treatment of contingent payment debt instruments, which apply to debt instruments issued on or after August 13, 1996. In general, the CPDI Regulations cause the timing and character of income, gain or loss reported on a contingent payment debt instrument to substantially differ from the timing and character of income, gain or loss reported on a contingent payment debt instrument under general principles of prior United States Federal income tax law. However, debt instruments that are subject to the rules regarding foreign currency gain or loss (the “Foreign Currency Rules”) are generally exempt from the timing and character rules provided by the CPDI Regulations. Since the amount payable at maturity with respect to the MITTS Securities in excess of the principal amount of the MITTS Securities (i.e., the Supplemental Redemption Amount) will be determined by reference to the value of the USD/EUR Rate, the MITTS Securities generally should be subject to the Foreign Currency Rules and should not be subject to the CPDI Regulations. However, the Foreign Currency Rules do not set forth specific rules for determining the amount of income, gain or loss realized by a taxpayer from holding a debt instrument that provides for one or more contingent payments, similar to the MITTS Securities. In the absence of any specific provision in the Foreign Currency Rules, the United States Federal income tax consequences of the purchase, ownership and disposition of the MITTS Securities should be governed by a combination of both the general principles contained in the Foreign Currency Rules and general principles of United States Federal income tax law.
 
Under general principles of United States Federal income tax law, payments of interest on a debt instrument generally will be taxable to a U.S. Holder as ordinary interest income at the time such payments are accrued or are received (in accordance with the U.S. Holder’s regular method of tax accounting). Under these principles, the amount payable at maturity with respect to a MITTS Security in excess of the principal amount thereof (i.e., the Supplemental Redemption Amount), if any, would be treated as contingent interest and generally would be includible in income by a U.S. Holder as ordinary interest on the date that the Supplemental Redemption Amount is accrued (i.e., generally when the Supplemental Redemption Amount becomes fixed in amount and becomes unconditionally payable) or when such amount is received, in accordance with the U.S. Holder’s regular method of tax accounting.
 
Upon the sale or exchange of a MITTS Security prior to maturity, a U.S. Holder generally would recognize taxable gain or loss in an amount equal to the difference, if any, between the amount realized on the sale or exchange and such U.S. Holder’s adjusted tax basis in the MITTS Security. A U.S. Holder’s adjusted tax basis in a MITTS Security generally will equal such U.S. Holder’s initial investment in the MITTS Security. Any portion of such gain or loss that is attributable to changes in the value of the USD/EUR Rate should constitute exchange gain or loss which will be characterized as ordinary income or loss. Any such gain or loss in excess of the portion of such gain or loss that constitutes exchange gain or loss generally should be capital gain or loss and should be long-term capital gain or loss if the MITTS Security has been held by the U.S. Holder for more than one year. It is possible, however, that the IRS could assert that all or any portion of the amounts realized upon the sale or exchange of a MITTS Security prior to its maturity in excess of the principal amount thereof constitutes ordinary interest income. In addition, U.S. Holders purchasing a MITTS Security at a price that differs from the adjusted issue price of the MITTS Security as of the purchase date (e.g., subsequent purchasers) may be subject to rules providing for certain adjustments to the foregoing rules and these U.S. Holders should consult their own tax advisors concerning these rules.

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Non-U.S. Holders
 
A non-U.S. Holder will not be subject to United States Federal income taxes on payments of principal, premium (if any) or interest (including original issue discount, if any) on a MITTS Security, unless such non-U.S. Holder is a direct or indirect 10% or greater shareholder of ML&Co., a controlled foreign corporation related to ML&Co. or a bank receiving interest described in section 881(c)(3)(A) of the Internal Revenue Code of 1986, as amended. However, income allocable to non-U.S. Holders will generally be subject to annual tax reporting on IRS Form 1042-S. For a non-U.S. Holder to qualify for the exemption from taxation, any person, U.S. or foreign, that has control, receipt or custody of an amount subject to withholding, or who can disburse or make payments of an amount subject to withholding (the “Withholding Agent”) must have received a statement that (a) is signed by the beneficial owner of the MITTS Security under penalties of perjury, (b) certifies that such owner is a non-U.S. Holder and (c) provides the name and address of the beneficial owner. The statement may generally be made on IRS Form W-8BEN (or other applicable form) or a substantially similar form, and the beneficial owner must inform the Withholding Agent of any change in the information on the statement within 30 days of that change by filing a new IRS Form W-8BEN (or other applicable form). Generally, a Form  W-8BEN provided without a U.S. taxpayer identification number will remain in effect for a period starting on the date the form is signed and ending on the last day of the third succeeding calendar year, unless a change in circumstances makes any information on the form incorrect. If a MITTS Security is held through a securities clearing organization or certain other financial institutions, the organization or institution may provide a signed statement to the Withholding Agent. Under certain circumstances, the signed statement must be accompanied by a copy of the applicable IRS Form W-8BEN (or other applicable form) or the substitute form provided by the beneficial owner to the organization or institution.
 
Under current law, a MITTS Security will not be includible in the estate of a non-U.S. Holder unless the individual is a direct or indirect 10% or greater shareholder of ML&Co. or, at the time of such individual’s death, payments in respect of such MITTS Security would have been effectively connected with the conduct by such individual of a trade or business in the United States.
 
Backup withholding
 
Backup withholding at the applicable statutory rate of United States Federal income tax may apply to payments made in respect of the MITTS Securities to registered owners who are not “exempt recipients” and who fail to provide certain identifying information (such as the registered owner’s taxpayer identification number) in the required manner. Generally, individuals are not exempt recipients, whereas corporations and certain other entities generally are exempt recipients. Payments made in respect of the MITTS Securities to a U.S. Holder must be reported to the IRS, unless the U.S. Holder is an exempt recipient or establishes an exemption. Compliance with the identification procedures described in the preceding section would establish an exemption from backup withholding for those non-U.S. Holders who are not exempt recipients.
 
In addition, upon the sale of a MITTS Security to (or through) a broker, the broker must withhold on the entire purchase price, unless either (a) the broker determines that the seller is a corporation or other exempt recipient or (b) the seller provides, in the required manner, certain identifying information (e.g., an IRS Form  W-9) and, in the case of a non-U.S. Holder, certifies that such seller is a non-U.S. Holder (and certain other conditions are met). Such a sale must also be reported by the broker to the IRS, unless either (a) the broker determines that the seller is an exempt recipient or (b) the seller certifies its non-U.S. status (and certain other conditions are met). Certification of the registered owner’s non-U.S. status would be made normally on an IRS Form W-8BEN (or other applicable form) under penalties of perjury, although in certain cases it may be possible to submit other documentary evidence.
 
Any amounts withheld under the backup withholding rules from a payment to a beneficial owner would be allowed as a refund or a credit against such beneficial owner’s United States Federal income tax provided the required information is furnished to the IRS.

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ERISA CONSIDERATIONS
 
Each fiduciary of a pension, profit-sharing or other employee benefit plan (a “plan”) subject to the Employee Retirement Income Security Act of 1974, as amended (“ERISA”), should consider the fiduciary standards of ERISA in the context of the plan’s particular circumstances before authorizing an investment in the Notes. Accordingly, among other factors, the fiduciary should consider whether the investment would satisfy the prudence and diversification requirements of ERISA and would be consistent with the documents and instruments governing the plan, and whether the investment would involve a prohibited transaction under Section 406 of ERISA or Section 4975 of the Internal Revenue Code (the “Code”).
 
Section 406 of ERISA and Section 4975 of the Code prohibit plans, as well as individual retirement accounts and Keogh plans subject to Section 4975 of the Internal Revenue Code (also “plans”) from engaging in certain transactions involving “plan assets” with persons who are “parties in interest” under ERISA or “disqualified persons” under the Code (“parties in interest”) with respect to the plan or account. A violation of these prohibited transaction rules may result in civil penalties or other liabilities under ERISA and/or an excise tax under Section 4975 of the Code for those persons, unless exemptive relief is available under an applicable statutory, regulatory or administrative exemption. Certain employee benefit plans and arrangements including those that are governmental plans (as defined in Section 3(32) of ERISA), certain church plans (as defined in Section 3(33) of ERISA) and foreign plans (as described in Section 4(b)(4) of ERISA) (“non-ERISA arrangements”) are not subject to the requirements of ERISA or Section 4975 of the Code but may be subject to similar provisions under applicable federal, state, local, foreign or other regulations, rules or laws (“similar laws”).
 
The acquisition of the Notes by a plan with respect to which we, MLPF&S, or certain of our affiliates is or becomes a party in interest may constitute or result in a prohibited transaction under ERISA or Section 4975 of the Code, unless those Notes are acquired pursuant to and in accordance with an applicable exemption. The U.S. Department of Labor has issued five prohibited transaction class exemptions, or “PTCEs”, that may provide exemptive relief if required for direct or indirect prohibited transactions that may arise from the purchase or holding of the Notes. These exemptions are:
 
 
(1)
PTCE 84-14, an exemption for certain transactions determined by independent qualified professional asset managers;
 
 
(2)
PTCE 90-1, an exemption for certain transactions involving insurance company pooled separate accounts;
 
 
(3)
PTCE 91-38, an exemption for certain transactions involving bank collective investment funds;
 
 
(4)
PTCE 95-60, an exemption for transactions involving certain insurance company general accounts; or
 
 
(5)
PTCE 96-23, an exemption for plan asset transactions managed by in-house asset managers.
 
The Notes may not be purchased or held by (1) any plan, (2) any entity whose underlying assets include “plan assets” by reason of any plan’s investment in the entity (a “plan asset entity”) or (3) any person investing “plan assets” of any plan, unless in each case the purchaser or holder is eligible for the exemptive relief available under any of the PTCEs listed above or another applicable similar exemption. Any purchaser or holder of the Notes or any interest in the Notes will be deemed to have represented by its purchase and holding of the Notes that it either (1) is not a plan or a plan asset entity and is not purchasing those Notes on behalf of or with “plan assets” of any plan or plan asset entity or (2) with respect to the purchase or holding, is eligible for the exemptive relief available under any of the PTCEs listed above or another applicable exemption. In addition, any purchaser or holder of the Notes or any interest in the Notes which is a non-ERISA arrangement will be deemed to have represented by its purchase and holding of the Notes that its purchase and holding will not violate the provisions of any similar law.

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Due to the complexity of these rules and the penalties that may be imposed upon persons involved in non-exempt prohibited transactions, it is important that fiduciaries or other persons considering purchasing the Notes on behalf of or with “plan assets” of any plan, plan asset entity or non-ERISA arrangement consult with their counsel regarding the availability of exemptive relief under any of the PTCEs listed above or any other applicable exemption, or the potential consequences of any purchase or holding under similar laws, as applicable.
 
USE OF PROCEEDS AND HEDGING
 
The net proceeds from the sale of the MITTS Securities will be used as described under “Use of Proceeds” in the accompanying prospectus and to hedge market risks of ML&Co. associated with its obligation to pay the principal amount and the Supplemental Redemption Amount, if any.
 
WHERE YOU CAN FIND MORE INFORMATION
 
We file reports, proxy statements and other information with the SEC. Our SEC filings are also available over the Internet at the SEC’s web site at http://www.sec.gov. The address of the SEC’s Internet site is provided solely for the information of prospective investors and is not intended to be an active link. You may also read and copy any document we file at the SEC’s public reference rooms in Washington, D.C. and New York, New York. Please call the SEC at 1-800-SEC-0330 for more information on the public reference rooms and their copy charges. You may also inspect our SEC reports and other information at the New York Stock Exchange, Inc., 20 Broad Street, New York, New York 10005.
 
We have filed a registration statement on Form S-3 with the SEC covering the MITTS Securities and other securities. For further information on ML&Co. and the MITTS Securities, you should refer to our registration statement and its exhibits. The prospectus accompanying this prospectus supplement summarizes material provisions of contracts and other documents that we refer you to. Because the prospectus may not contain all the information that you may find important, you should review the full text of these documents. We have included copies of these documents as exhibits to our registration statement.
 
You should rely only on the information contained or incorporated by reference in this prospectus supplement and the accompanying prospectus. We have not, and the underwriter has not, authorized any other person to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely on it. We are not, and the underwriter is not, making an offer to sell these securities in any jurisdiction where the offer or sale is not permitted.
 
UNDERWRITING
 
MLPF&S has agreed, subject to the terms and conditions of the underwriting agreement and a terms agreement, to purchase from ML&Co. $         aggregate principal amount of MITTS Securities. The underwriting agreement provides that the obligations of the underwriter are subject to certain conditions and that the underwriter will be obligated to purchase all of the MITTS Securities if any are purchased.
 
The underwriter has advised ML&Co. that it proposes initially to offer all or part of the MITTS Securities directly to the public at the offering prices set forth on the cover page of this prospectus supplement and that it may offer a part of the MITTS Securities to certain dealers at a price that represents a concession not in excess of     % of the principal amount of the MITTS Securities. The underwriter may allow, and any such dealer may reallow, a concession not in excess of     % of the principal amount of the MITTS Securities to certain other dealers. After the initial public offering, the public offering prices may be changed. The underwriter is offering the MITTS Securities subject to receipt and acceptance and subject to the underwriter’s right to reject any order in whole or in part. Proceeds to be received by ML&Co. will be net of the underwriting discount and expenses payable by ML&Co.

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MLPF&S, a broker-dealer subsidiary of ML&Co. is a member of the National Association of Securities Dealers, Inc. and will participate in distributions of the MITTS Securities. Accordingly, offerings of the MITTS Securities will conform to the requirements of Rule 2720 of the Conduct Rules of the NASD.
 
The underwriter is permitted to engage in certain transactions that stabilize the price of the MITTS Securities. These transactions consist of bids or purchases for the purpose of pegging, fixing or maintaining the price of the MITTS Securities.
 
If the underwriter creates a short position in the MITTS Securities in connection with the offering, i.e., if it sells more units of the MITTS Securities than are set forth on the cover page of this prospectus supplement, the underwriter may reduce that short position by purchasing units of the MITTS Securities in the open market. In general, purchases of a security for the purpose of stabilization or to reduce a short position could cause the price of the security to be higher than it might be in the absence of these purchases. “Naked” short sales are sales in excess of the underwriter’s overallotment option or, where no overallotment options exists, sales in excess of the number of units an underwriter has agreed to purchase from the issuer. Because MLPF&S, as underwriter for the MITTS Securities, has no overallotment option, it would be required to closeout a short position in the MITTS Securities by purchasing MITTS Securities in the open market. Neither ML&Co. nor the underwriter makes any representation or prediction as to the direction or magnitude of any effect that the transactions described above may have on the price of the MITTS Securities. In addition, neither ML&Co. nor the underwriter makes any representation that the underwriter will engage in these transactions or that these transactions, once commenced, will not be discontinued without notice.
 
MLPF&S may use this prospectus supplement and the accompanying prospectus for offers and sales related to market-making transactions in the MITTS Securities. MLPF&S may act as principal or agent in these transactions, and the sales will be made at prices related to prevailing market prices at the time of sale.
 
VALIDITY OF THE MITTS SECURITIES
 
The validity of the MITTS Securities will be passed upon for ML&Co. and for the underwriter by Sidley Austin Brown & Wood LLP, New York, New York.
 
EXPERTS
 
The consolidated financial statements and the related financial statement schedule incorporated in this prospectus by reference from the Annual Report on Form 10-K of Merrill Lynch & Co., Inc. and subsidiaries for the year ended December 28, 2001 have been audited by Deloitte & Touche LLP, independent auditors, as stated in their reports, which are incorporated herein by reference, and have been so incorporated in reliance upon the reports of such firm given upon their authority as experts in accounting and auditing.
 
With respect to the unaudited condensed consolidated financial statements for the periods ended March 29, 2002 and March 30, 2001 and June 28, 2002 and June 29, 2001 which are incorporated herein by reference, Deloitte & Touche LLP have applied limited procedures in accordance with professional standards for a review of such information. However, as stated in their reports included in the Company’s Quarterly Reports on Form 10-Q for the quarters ended March 29, 2002 and June 28, 2002 and incorporated by reference herein, they did not audit and they do not express an opinion on those unaudited condensed consolidated financial statements. Accordingly, the degree of reliance on their reports on such information should be restricted in light of the limited nature of the review procedures applied. Deloitte & Touche LLP are not subject to the liability provisions of Section 11 of the Securities Act of 1933 for their reports on the unaudited condensed consolidated financial statements because those reports are not “reports” or a “part” of the registration statement prepared or certified by an accountant within the meaning of Sections 7 and 11 of the Act.

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INDEX OF DEFINED TERMS
 
    
Page

Business Day
  
S-13
Capped Value
  
S-4
Code
  
S-23
CPDI Regulations
  
S-21
depositary
  
S-15
DTC
  
S-4
EC
  
S-4
Ending Value
  
S-5
ERISA
  
S-23
Foreign Currency Rules
  
S-21
IRS
  
S-20
MITTS Securities
  
S-1
ML&Co.
  
S-4
MLPF&S
  
S-4
non-ERISA arrangements
  
S-23
non-U.S. Holder
  
S-20
Participation Rate
  
S-5
parties in interest
  
S-23
plan
  
S-23
plan asset entity
  
S-23
plans
  
S-23
Pricing Date
  
S-4
principal amount
  
S-4
Reference Amount
  
S-13
Reference Dealers
  
S-13
Reuters
  
S-5
similar laws
  
S-23
Starting Value
  
S-5
Supplemental Redemption Amount
  
S-4
USD/EUR Rate
  
S-5
U.S. Holder
  
S-20
Withholding Agent
  
S-22

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LOGO
1,000,000 Units
 
 
 
Merrill Lynch & Co., Inc.
 
 
 
Market Index Target-Term Securities®
Linked to the USD/EUR Exchange Rate due August     , 2005
“MITTS® Securities”
$10 principal amount per unit
 
 

 
PROSPECTUS SUPPLEMENT
 

 
 
 
 
Merrill Lynch & Co.
 
 
 
August     , 2002
 
“MITTS” and “Market Index Target-Term Securities” are registered service marks of Merrill Lynch & Co., Inc.